Gonadotrophin levels in male voles (Microtus agrestis) reared in long and short photoperiods
نویسندگان
چکیده
منابع مشابه
The effect of mating upon LH release in male and female voles of the species Microtus agrestis.
Members of the microtine species are probably reflex ovulators. The prairie vole, Microtus ochrogaster (Richmond & Conway, 1969), the meadow vole, M. pennsylvanicus (Clulow & Mallory, 1970), the levant vole, M. guentheri (Bodenheimer & Sulman, 1946), the Californian vole, M. californicus (Greenwald, 1956), and the montane vole, Microtus montanus (Gray, Davis, Zerylnick & Dewsbury, 1974) have al...
متن کاملThe consequences of acute cold exposure on protein oxidation and proteasome activity in short-tailed field voles, microtus agrestis.
During cold exposure, animals upregulate their metabolism and food intake, potentially exposing them to elevated reactive oxygen species (ROS) production and oxidative damage. We investigated whether acute cold (7 +/- 3 degrees C) exposure (1, 10, or 100 h duration) affected protein oxidation and proteasome activity, when compared to warm controls (22 +/- 3 degrees C), in a small mammal model, ...
متن کاملChanges over time in the spatiotemporal dynamics of cyclic populations of field voles (Microtus agrestis L.).
We demonstrate changes over time in the spatial and temporal dynamics of an herbivorous small rodent by analyzing time series of population densities obtained at 21 locations on clear cuts within a coniferous forest in Britain from 1984 to 2004. Changes had taken place in the amplitude, periodicity, and synchrony of cycles and density-dependent feedback on population growth rates. Evidence for ...
متن کاملPregnancy blockage and the memory of the stud male in the vole (Microtus agrestis).
When female voles were allowed contact with the stud male for only 1 h at the time of mating, 55% exhibited pregnancy failure when exposed to a strange male 48 h later. When females were made psuedopregnant by hormone treatment and vaginal stimulation (i.e. no stud male involved), 87% exhibited luteal failure when exposed to a strange male. It is suggested that the characteristics of the stud m...
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از گذشته تا کنون، تحقیقات بسیاری صورت گرفته است که همگی به گونه ای بر مثمر ثمر بودن استفاده از استراتژی های یادگیری لغت در یک زبان بیگانه اذعان داشته اند. این تحقیق به بررسی تاثیر دو روش مختلف آموزش واژگان انگلیسی (کلیدی و بافتی) بر تلفظ و دانش لغوی فراگیران ایرانی زیر متوسط زبان انگلیسی و بر ماندگاری آن در حافظه می پردازد. به این منظور، تعداد شصت نفر از زبان آموزان ایرانی هشت تا چهارده ساله با...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1982
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0660709